Cheilanthes pringlei Davenp.
Descripción
Rhizomes long-creeping, horizontal, 1 mm diam.; rhizome scales linear-lanceolate, weakly bicolorous with orange-brown center and paler margins, 2.5–3 mm long, obscurely and irregularly toothed along margins; fronds to 13(–23) cm long, approximate to slightly spaced; stipes 1⁄2–2⁄3 the frond length, reddish brown, lustrous, grooved, with scattered to abundant (imbricate) linear whitish scales and reduced scales and contorted small hairs less than 0.1 mm; blades oblong-lanceolate or deltate to nearly pentagonal, 3–4-pinnate-pinnatifid; pinnae 3–6 pairs, basal pair exaggerated basiscopically; rachises and rachillae sparsely to densely scaly with white to tan, linear, irregularly toothed scales 1–2 mm long, otherwise glabrous adaxially and abaxially; segment lobe margins curved, but not or only slightly differentiated; spores tan.A
Forma de vida
Epipétrica, TerrestreB
Elevación
350 – 2600 mA
Ecología y Hábitat
On dry rocky slopes.A
Tipo de vegetación
Matorral rosetófiloB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Key to the Mexican Varieties of Cheilanthes pringlei
Frond scales abundant, imbricate, toothed; hairs inconspicuous; blades deltate; BCS, Chih, Son. ...................................................................................................................var. pringlei.
Frond scales scattered, not regularly imbricate; hairs conspicuous; blades oblong to deltate; Coah, SLP, Gto, Qro, Hgo, Pue, Oax, Zac. .......................................var. moncloviensis.
Cheilanthes pringlei var. pringlei Davenp., Bull. Torrey Bot. Club 10(6): 61, t. 34. 1883
Cheilanthes sonorensis Goodd., Muhlenbergia 8: 93. 1912
Differing from var. moncloviensis in having abundant frond scales, inconspicuous hairs, and more westerly distribution; 2n=60 (USA).
Distribution. Dry, rocky slopes; 350–1100 m. USA (Ariz); Mexico.
Selected Specimens Examined. BCS (Moran 18806, ASC). Chih (Bye 7731, GH, MEXU, MICH; Knobloch 881, DS, LL; Palmer 116, GH, MICH, NY). Son (Felger 20278, MEXU; Kennedy 7047, CAS, UC; Ownbey & Ownbey 1773, GH, NY, UC; Palmer 265, GH, NY, UC; Wiggins 6166, 7422, DS, MICH).
Unverified, Doubtful, or Mistaken Reports. Qro (Zamudio 3528, IEB, cited by Díaz-Barriga & Palacios-Rios, 1992, but not verified).
Cheilanthes pringlei var. moncloviensis (Baker) Mickel, Mem. New York Bot. Gard. 88: 207. 2004
Cheilanthes moncloviensis Baker, Ann. Bot. (Oxford) 5(2): 210. 1891
Myriopteris pringlei subsp. moncloviensis (Baker) Grusz & Windham, PhytoKeys 32: 60. 2013
Differing from var. pringlei in having scattered frond scales, conspicuous hairs, and more easterly distribution.
Distribution. Epipetric on basaltic rocks; 1650–2600 m. Mexico.
Selected Specimens Examined. Coah (only the type). Hgo (Diggs et al. 2028a, WIS; Orcutt 3930, DS). Gto (Pray 3075, LAM). Oax (Mickel 6644, NY). Pue (Purpus 4046, NY). Qro (Rose & Rose 11146, US). SLP (Parry & Palmer 990, NY p.p.; Siegler & Halstein DS-400, MEXU). Zac (Orcutt 3110, DS).
Most specimens have blades oblong-lanceolate, rather than distinctly deltate as in var. pringlei, although the Oaxaca and Coahuila specimens are somewhat deltate. The sparser scales in var. moncloviensis seem to be more diagnostic than the blade shape. They make the hairs more conspicuous, though they are present in var. pringlei too.A
Frond scales abundant, imbricate, toothed; hairs inconspicuous; blades deltate; BCS, Chih, Son. ...................................................................................................................var. pringlei.
Frond scales scattered, not regularly imbricate; hairs conspicuous; blades oblong to deltate; Coah, SLP, Gto, Qro, Hgo, Pue, Oax, Zac. .......................................var. moncloviensis.
Cheilanthes pringlei var. pringlei Davenp., Bull. Torrey Bot. Club 10(6): 61, t. 34. 1883
Cheilanthes sonorensis Goodd., Muhlenbergia 8: 93. 1912
Differing from var. moncloviensis in having abundant frond scales, inconspicuous hairs, and more westerly distribution; 2n=60 (USA).
Distribution. Dry, rocky slopes; 350–1100 m. USA (Ariz); Mexico.
Selected Specimens Examined. BCS (Moran 18806, ASC). Chih (Bye 7731, GH, MEXU, MICH; Knobloch 881, DS, LL; Palmer 116, GH, MICH, NY). Son (Felger 20278, MEXU; Kennedy 7047, CAS, UC; Ownbey & Ownbey 1773, GH, NY, UC; Palmer 265, GH, NY, UC; Wiggins 6166, 7422, DS, MICH).
Unverified, Doubtful, or Mistaken Reports. Qro (Zamudio 3528, IEB, cited by Díaz-Barriga & Palacios-Rios, 1992, but not verified).
Cheilanthes pringlei var. moncloviensis (Baker) Mickel, Mem. New York Bot. Gard. 88: 207. 2004
Cheilanthes moncloviensis Baker, Ann. Bot. (Oxford) 5(2): 210. 1891
Myriopteris pringlei subsp. moncloviensis (Baker) Grusz & Windham, PhytoKeys 32: 60. 2013
Differing from var. pringlei in having scattered frond scales, conspicuous hairs, and more easterly distribution.
Distribution. Epipetric on basaltic rocks; 1650–2600 m. Mexico.
Selected Specimens Examined. Coah (only the type). Hgo (Diggs et al. 2028a, WIS; Orcutt 3930, DS). Gto (Pray 3075, LAM). Oax (Mickel 6644, NY). Pue (Purpus 4046, NY). Qro (Rose & Rose 11146, US). SLP (Parry & Palmer 990, NY p.p.; Siegler & Halstein DS-400, MEXU). Zac (Orcutt 3110, DS).
Most specimens have blades oblong-lanceolate, rather than distinctly deltate as in var. pringlei, although the Oaxaca and Coahuila specimens are somewhat deltate. The sparser scales in var. moncloviensis seem to be more diagnostic than the blade shape. They make the hairs more conspicuous, though they are present in var. pringlei too.A